.content{
    background-color: #a2c9d8;
  }
.main {
  margin-top: 3rem;
}
  .main-list{
    position: relative;
  }
  .problemList{
    float: left;
    width: 96%;
    box-sizing: border-box;
    background-color: #f5f5f5;
    margin: 1rem 2%;
    padding: 0.5rem 0;
    color: #000;
  }
  .subject{
    margin: 1.2rem  2.5rem;
    
  }
  .subject h3{
    font-size: 1.5rem;
  }
  .subject p{
    font-size: 0.75rem;
    margin: 0.3rem 0.75rem;
    line-height: 1.2rem;
  }
  .option{
    margin: 0.3rem 0.5757rem;
  }
  .option li{
    margin: 0.3rem 1rem 0.5rem;
    position: relative;
    display: inline-flex;
  }
  .option li.on{
    background-color: #44b1c9;
    color: #fff;
    border: 0.1rem solid #44b1c9;
  }
  .option li span{
    min-width: 6rem;
    text-align: center;
    border-radius: 0.5rem;
    border: 0.1rem solid #cccccc;
    color: #000;
    font-size: 1rem;
    padding: 0.3rem 1rem;
    display: block;
  }
  .option li .on span{
    background-color: #44b1c9;
    color: #fff;
    border: 0.1rem solid #44b1c9;
  }
  .btn-groups{
    width: 100%;
    height: 3rem;
    background-color: rgba(162,201,216,.8);
  }
  .btn-groups-height{
/*    background: white;
    height: 3rem;*/
  }
  .submit{
    display: block;
    float:left;
    background-color: #44b1c9;
    color:#fff;
    width: 8rem;
    font-size: 1.2rem;
    font-weight: bold;
    padding: 0.5rem 0;
    text-align: center;
    border-radius: 0.15rem;
    margin: 0.5rem 2rem;
  }
  .submit:active{
    background: rgba(68,177,201,.5);
  }

.btn-groups .prev, .btn-groups .next, .btn-groups .save { font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
}

  input[type='checkbox']{
    width: 100%;
    height: 100%;
    -webkit-appearance: checkbox;
    position: absolute;
    opacity: 0;
    top: 0;
    left: 0;
  }
  input[type='radio']{
    width: 100%;
    height: 100%;
    -webkit-appearance: radio;
    position: absolute;
    opacity: 0;
    top: 0;
    left: 0;
    cursor: pointer;
  }
.option li span:hover {
  border-color: #1890ff;
}
  input[type='checkbox']:checked + span,input[type='radio']:checked + span{
    background-color: #44b1c9;
    color: #fff;
    border: 0.1rem solid #44b1c9;
  }

  /*动画*/
  .slide-enter,.slide_back-enter{
    position: absolute;
    width: 100%;
  }
  .slide-leave,.slide_back-leave{
    position: absolute;
    width: 100%;
  }
  .slide-enter-active,.slide_back-enter-active{
    transition: all 0.3s linear;
  }
  .slide-leave-active{
    position: absolute;
    transition: all 0.3s linear;
    transform: translate(-100%);
  }
  .slide-enter{
    transform: translateX(100%);
  }
  .slide_back-leave-active{
    position: absolute;
    transition: all 0.3s linear;
    transform: translate(100%);
  }
  .slide_back-enter{
    transform: translateX(-100%);
  }

  